2HHK	Photosynthesis Membrane Protein	date	Jun 28, 2006
title	Reaction Centre From Rhodobacter Sphaeroides Strain R-26.1 C With Dibrominated Phosphatidylglycerol
authors	A.W.Roszak, A.T.Gardiner, N.W.Isaacs, R.J.Cogdell
compound		source
Molecule: Reaction Center Protein L Chain Chain: L Synonym: Photosynthetic Reaction Center L Subunit		Organism_scientific: Rhodobacter Sphaeroides Organism_taxid: 1063 Strain: R26.1 Other_details: Strain R-26.1 Of Rhodobacter Sphaeroides Bac A Partial Revertant Of The R-26 Chemical Mutant Of The Wild Strain 2.4.1. While R-26 Has No Lh2 Antenna And No Caroteno R-26.1 Has Altered Lh2 Antenna And No Carotenoid. Reaction From R-26.1 Strain Is Therefore Identical With The Wild-Typ 2.4.1 Except For The Missing Carotenoid.;
Molecule: Reaction Center Protein M Chain Chain: M Synonym: Photosynthetic Reaction Center M Subunit		Organism_scientific: Rhodobacter Sphaeroides Organism_taxid: 1063 Strain: R26.1 Other_details: Strain R-26.1 Of Rhodobacter Sphaeroides Bac A Partial Revertant Of The R-26 Chemical Mutant Of The Wild Strain 2.4.1. While R-26 Has No Lh2 Antenna And No Caroteno R-26.1 Has Altered Lh2 Antenna And No Carotenoid. Reaction From R-26.1 Strain Is Therefore Identical With The Wild-Typ 2.4.1 Except For The Missing Carotenoid.;
Molecule: Reaction Center Protein H Chain Chain: H Synonym: Photosynthetic Reaction Center H Subunit		Organism_scientific: Rhodobacter Sphaeroides Organism_taxid: 1063 Strain: R26.1 Other_details: Strain R-26.1 Of Rhodobacter Sphaeroides Bac A Partial Revertant Of The R-26 Chemical Mutant Of The Wild Strain 2.4.1. While R-26 Has No Lh2 Antenna And No Caroteno R-26.1 Has Altered Lh2 Antenna And No Carotenoid. Reaction From R-26.1 Strain Is Therefore Identical With The Wild-Typ 2.4.1 Except For The Missing Carotenoid.
symmetry	Space Group: P 31 2 1	R_factor 0.172 R_Free 0.197
crystal cell	length a length b length c angle alpha angle beta angle gamma 139.417 139.417 183.701 90.00 90.00 120.00
method	X-Ray Diffraction	resolution	2.50 Å
ligand	BCL, BPH, CDL, CL, FE, GOL, K, LDA, PGK, PGT, PO4, U10	enzyme
Gene Ontology	Chain Function Process Component H electron transporter, transf... L M
Primary reference	Brominated Lipids Identify Lipid Binding Sites on the Surface of the Reaction Center from Rhodobacter sphaeroides., Roszak AW, Gardiner AT, Isaacs NW, Cogdell RJ, Biochemistry. 2007 Mar 20;46(11):2909-16. Epub 2007 Feb 23. PMID:17315985

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (168 Kb) [Save to disk] Biological Unit Coordinates (2hhk.pdb1.gz) 155 Kb LPC: Ligand-Protein Contacts for 2HHK CSU: Contacts of Structural Units for 2HHK Likely Quarternary Molecular Structure file(s) for 2HHK Structure Factors (522 Kb) Retrieve 2HHK in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 2HHK from S2C, [Save to disk] Re-refined 2hhk structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 2HHK in 3D

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Visual 3D analysis of 2HHK

Ramachandran plot from PDBSum

Structure-derived information

Electron Density related parameters from EDS Electron Density Server, at Upsala Dipole moment, from Dipole Server at Weizmann Institute 3D motif for 2HHK, from MSDmotif at EBI

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [2hhk] [2hhk_M] [2hhk_L] [2hhk_H] SWISS-PROT database: [P0C0Y7] [P0C0Y8] [P0C0Y9] Belongs to the photosynthetic reaction center (prc) family according to TCDB. Domain organization of [RCEH_RHOSH] [RCEL_RHOSH] [RCEM_RHOSH] by SWISSPFAM

Other resources with information on 2HHK

Community annotation for 2HHK at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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